Share Read on Mobile Enter Reading Mode Lee Sung Kyung and Yoon Kyun Sang to cameo on Lee Jong Suk and Suzy's drama 'While You Were Sleeping' Posted on 2017-06-22 19:24:57 by ifrit ActorsLee Sung KyungandYoon Kyun Sangwill be making cameo appearances in upcomingSBSdrama 'While You Were Sleeping'! Comment